Finding the Third Proportional to 3,931,255 and 8,409,020

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931,255 : 8,409,020 = 8,409,020 : x
2. Step 2: Convert to fraction form
   3,931,255/8,409,020 = 8,409,020/x
3. Step 3: Cross multiply
   3,931,255x = 8,409,020 × 8,409,020
4. Step 4: Simplify right side
   3,931,255x = 70,711,617,360,400
5. Step 5: Solve for x
   x = 70,711,617,360,400/3,931,255
6. Step 6: Final answer
   x = 17,987,034.00